Mehmet KILIÇ, Kadim BAYAN, Şerif YILMAZ, Yekta TÜZÜN, Mehmet DURSUN, and Fikri CANORUÇ, “Changes in pulse oximetry levels and factors affecting oxygen saturation during routine upper gastrointestinal endoscopy with or without sedation”, Turkish Journal of Gastroenterology, vol. 17, no. 4, pp. 279–282, Jul. 2019.